diff options
Diffstat (limited to 'gcc/config/aarch64/aarch64.c')
| -rw-r--r-- | gcc/config/aarch64/aarch64.c | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c index af5b4c23975..15fe7554532 100644 --- a/gcc/config/aarch64/aarch64.c +++ b/gcc/config/aarch64/aarch64.c @@ -6108,13 +6108,45 @@ cost_plus: return false; case NOT: + x = XEXP (x, 0); + op0 = aarch64_strip_shift (x); + + /* MVN-shifted-reg. */ + if (op0 != x) + { + *cost += rtx_cost (op0, (enum rtx_code) code, 0, speed); + + if (speed) + *cost += extra_cost->alu.log_shift; + + return true; + } + /* EON can have two forms: (xor (not a) b) but also (not (xor a b)). + Handle the second form here taking care that 'a' in the above can + be a shift. */ + else if (GET_CODE (op0) == XOR) + { + rtx newop0 = XEXP (op0, 0); + rtx newop1 = XEXP (op0, 1); + rtx op0_stripped = aarch64_strip_shift (newop0); + + *cost += rtx_cost (newop1, (enum rtx_code) code, 1, speed) + + rtx_cost (op0_stripped, XOR, 0, speed); + + if (speed) + { + if (op0_stripped != newop0) + *cost += extra_cost->alu.log_shift; + else + *cost += extra_cost->alu.logical; + } + + return true; + } /* MVN. */ if (speed) *cost += extra_cost->alu.logical; - /* The logical instruction could have the shifted register form, - but the cost is the same if the shift is processed as a separate - instruction, so we don't bother with it here. */ return false; case ZERO_EXTEND: |